1. In 1920, the first woman was elected to the Wisconsin legislature.
On September 10, 1920, Ada L. James won the special election to fill the vacant seat in the Wisconsin State Assembly representing the 35th District. She was the first woman to be elected to the Wisconsin legislature.

2. The famous Wisconsin cheese steak sandwich was invented in 1930.
The cheese steak sandwich, which is one of the most popular sandwiches in the United States, was first invented in 1930 by a man named Louie Erb in Milwaukee, Wisconsin.

3. Wisconsin's first state fair was held on September 10, 1851.
The first Wisconsin State Fair was held on September 10, 1851, in Janesville, Wisconsin. It was a one-day event that attracted nearly 12,000 visitors.

4. The Green Bay Packers played their first NFL game on September 10, 1921.
The Green Bay Packers, one of the most storied franchises in NFL history, played their first NFL game on September 10, 1921. They lost to the Chicago Staleys (later renamed the Chicago Bears) by a score of 20-0.

5. The Harley-Davidson motorcycle company was founded on September 10, 1903.
On September 10, 1903, William S. Harley and Arthur Davidson founded the Harley-Davidson motorcycle company in Milwaukee, Wisconsin. The company has since become one of the most iconic motorcycle brands in the world.